affectationdesressources allocationderessources business conservationofnaturalresources economiaambiental economics economiedel'environnement environmentaleconomics gestion greenbusiness management mathematicalmodels microsoftexcel microsoftexcel(computerfile) milieueconomie modèlesmathématiques naturalresources nature natuurlijkehulpbronnen natürlicheressourcen optimierung recursosnaturais(economia) resourceallocation ressourcenmanagement ressourcenpolitik ressourcenökonomie ressourcesnaturelles umweltpolitik wiskundigemodellen